<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>Airline - ECHARTS-GL</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
    <meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
    <link rel="stylesheet" href="./common.css">
</head>
<body>
<div id="main"></div>
<script src="../node_modules/echarts/dist/echarts.js"></script>
<script src="../node_modules/echarts/theme/dark.js"></script>
<script src="../dist/echarts-gl.js"></script>
<script src="lib/jquery.min.js"></script>
<script src="js/commonUI.js"></script>
<script>
    var chart = echarts.init(document.getElementById('main'), 'dark');

    $.getJSON('data/flights.json', function (data) {
        // Airport: [name, city, country, longitude, latitude]
        var airports = data.airports.map(function (item) {
            return {
                coord: [item[3], item[4]]
            }
        });

        // Route: [airlineIndex, sourceAirportIndex, destinationAirportIndex]
        var routesGroupByAirline = {};
        data.routes.forEach(function (route) {
            var airline = data.airlines[route[0]];
            var airlineName = airline[0];
            if (!routesGroupByAirline[airlineName]) {
                routesGroupByAirline[airlineName] = [];
            }
            routesGroupByAirline[airlineName].push(route);
        });

        var series = data.airlines.map(function (airline) {
            var airlineName = airline[0];
            var routes = routesGroupByAirline[airlineName];

            if (!routes) {
                return null;
            }
            return {
                type: 'lines3D',
                name: airlineName,


                effect: {
                    show: false,
                    trailWidth: 4
                },

                lineStyle: {
                    width: 2,
                    color: 'rgb(50, 50, 150)',
                    opacity: 0.1
                },
                blendMode: 'lighter',

                data: routes.map(function (item) {
                    return [airports[item[1]].coord, airports[item[2]].coord];
                })
            };
        }).filter(function (series) {
            return !!series;
        });

        chart.setOption({
            backgroundColor: '',
            legend: {
                show: false,
                left: 'left',
                data: Object.keys(routesGroupByAirline),
                orient: 'vertical'
            },
            globe: {
                baseTexture: 'asset/world.topo.bathy.200401.jpg',
                heightTexture: 'asset/elev_bump_4k.jpg',

                shading: 'lambert',

                light: {
                    ambient: {
                        intensity: 0.4
                    },
                    main: {
                        intensity: 0.4
                    }
                },

                viewControl: {
                    autoRotate: false
                }
            },
            series: series
        });

        window.onresize = chart.resize;

    });
</script>
</body>
</html>
